Feeding means for drills



F. M. SLATER.. FEEDING MEANS FOR DRILLS. APPLICATION FILED APR. 15,1919.

Patented Dec. 7, 1920.

I III" INVENTOR.

ATTORNEY UNITED STATES PATENT OFFICE.

FRED 1V1. SLATER, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RANDCOMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW J ERSEY.

FEEDING MEANS FOR DRILLS.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application filed April 15, 1919. Serial No. 290,199.

To all it 710m it may concern:

Be it known that I, Finn) M. SLATER, a citizen of the United States,residing at Easton, in the county of Northampton and State ofPennsylvania, have invented a certain new and useful Improvement inFeeding Means for Drills, of which the following is a specification. j

This invention relates to mounting and feeding means for fluid actuatedtools and in particular to a feeding means for percussive drills whichwill permit a long travel of the drill motor in its shell.

The objects of the present invention are to provide a feeding means forrock drills which will permit a greatly increased length of travel ofthe drill motor or cylinder without changing the position of the shellin which the cylinder is mounted and which will also permit the operatorof the tool to follow the tool and remain constantly up with it as itmoves forwardly. A further object of the invention is to provide aconstruction in which all of the controlling devices for the tool aremounted upon the drill motor; that'is, the crank handle which is usuallyfound at the rear of the shell is mounted on the drill motor or cylinderin proximity to the throttle and therefore moves with the motor ratherthan remains stationary on the shell.

In the feed shells as at present made the length is greatly limited bythe fact that the feed handle and throttle handle must be at all timeswithin the reach of the operator and so the movement of the toolforwardly is limited to the distance the operator can reach from thefeed handle to the throttle. In the present construction thethrottlefand feed handle are always conveniently near each other and theonly limit to the length of travel of the tool is the length of steelusedor depth of hole desired.

A further object of the invention is to provide mechanism to providethis long feed for the tool which may be attached to present forms oftools without alteration although it is to be understood that a new toolmay be provided with the parts of the mechanism made integrally .withthe cylinder or back head.

With the above and other objects in view my invention consists in thefeatures of construction and operation set forth in the followingspecification and illustrated in the accompanying drawings, in which:

Figure 1 shows a longitudinal view of the shell with the drill motorthereon;

Fig. 2, a longitudinal view in section of parts forming the presentinvention;

Fig. 3 a transverse view of a modified form of the invention;

Fig. 4:, a view taken on the line 44 of Fig. 2; and

Fig. 5;, a portion of the feed screw and its connection to the shell.

Referring more particularly to the figures of the drawing, 1 refers tothe shell in which the motor casing 20f a percussive tool is adapted toslide. The shell 1 is of the usual type used in connection with rockdrills except for its length which is greatly increased. Extendinglongitudinally of the shell 1 is a feed screw 3 supported centrally ofthe shell by means of short supporting members 4 having a bearing 5 forthe ends of the feed screw 3 and a threaded extension 6 extends throughthe wall of-the shell 1 below which is located a nut 7 securely holdingthe supporting member 4 in place.

The motor casing 2 shown in the annexed drawings is one of the usualform to which the present form offeeding means is adapted to be attachedwithout any modification of the tool. This provides a form that may beapplied readily to any tool already completed but it may be readily seenthat in the manufacture of new tools some of the parts may beconstructed integrally with the motor casing as parts of the back-heador of the cylinder.

The feed screw 3 passes through the feed nut 8 inserted in the usualwayin lug 9 provided on the lower surface of the motor casing 2 so that thefeed screw 3 passes through a portion of the motor casing 2. In the formof the invention shown in Figs. 2 and 1 the feeding means are attachedto the motor by means of the feed nut holding sleeve 10. The sleeve 10is provided with a circumferential groove 11 by means the groove 11. Theframe 12 is also provided with lateral extensions 13 adapted to entercorresponding guideways 14 provided in the shell 1. A gear 15 is mountedon the feed screw 3 and is held from rotating loosely thereon by meansof a key 16, held in the gear 15 and entering a splineway 17 providedfrom end to end of the feed screw 3.

From the above description it will be seen that rotation of the gear 15will rotate the feed screw 3 and as the feed nut 8 is rigidly fastenedto the drill casing 2 the drill casing will be forced forwardly orrearwardly depending upon the direction of rotation of the feed screw 3.

As a convenient way of rotating the gear 15 the frame 12 is providedwith a short shaft 18 upon which a gear 19 is fastened in a position tomesh with the gear 15. Upon the shaft 18 a handle 20 is mountedconveniently located to be rotated by the operator.

In the modified form of the invention shown in Fig. 3 the gear 21 whichcorresponds to gear 15 in Fig. 2 is in the form of a worm gear wheel andmeshing with it is a worm 22 mounted upon a short shaft 28 upon whichthe handle 24 is located. This form of the invention provides the handle24 at one side of the drill casing 2 instead of as shown in Figs. 1 and2 directly in rear of the drill casing 2.

.It is to be understood that the present showing and descriptiondisclose only certain specific embodiments of the'present invention andthat other forms and modifica tions are included within the spirit andscope of the invention as expressed in the appended claims.

What I claim is:

1. In feeding means for fluid actuated tools, in combination, a shell, adrill casing slidably mounted in said shell, a rotatable feed screwmounted longitudinally of said shell and passing through a portion ofsaid drill casing and means attached to said drill casing and movabletherewith including a feed nut carried by the drill casing and directlyengaging the feed screw for manually moving said drill casing forwardlyand backwardly in the shell.

2. In feeding means for fluid actuated tools, in combination, a shell, adrill casing slidably mounted in said shell, a rotatable feed screwmounted longitudinally of said shell and passing through a portion ofsaid casing, a feed nut carried by the drill casing and engaging saidfeed screw, a gear splined to said feed screw and means attached to saiddrill casing and movable therewith for rotating said gear to move saiddrill casing forwardly and backwardly in the shell.

3. In feeding means for fluid actuated tools, in combination, a shell, adrill casing slidably mounted in said shell, a feed screw mountedlongitudinally of said shell and passing through a portion of said drillcas ing, said drill casing being provided with means attached theretoand moving therewith adapted to rotate said feed screw, said meanscomprising a pair of gears and hand operated means for rotating saidgears to rotate the feed screw, and a feed nut carried by the drillcasing for engaging said feed screw to move the drill casing forwardlyand backwardly in the shell.

4. In feeding means for fluid actuated tools, in combination, a shell, adrill casing slidably mounted in said shell, feed screw mountedlongitudinally of said shell and passing through a portion of said drillcasing, said drill being provided with means attached thereto and movingtherewith adapted to rotate said feed screw, said means comprising agear splined to said feed screw, another gear meshing with said firstmentioned gear, means for rotating said gears to rotate the feed screw,and a feed nut carried by the drill casing for engaging said feed screwto move said drill casing forwardly and backwardly in the shell.

In feeding means for fluid actuated tools, in combination, a shell, adrill casing.

slidably mounted in said shell, a feed screw mounted longitudinally ofthe shell and passing through a portion of the drill casing, a feed nutcarried by the drill casing for engaging said feed screw and manuallyoperated means mounted on and moving with said drill casing for rotatingsaid feed screw relative to said feed nut to advance or recede saiddrill casing in said shell.

In testimony whereof I have hereunto set mv'hand.

FRED M. SLATER.

